Average Monthly Sunshine hours in O'Fallon (IL)

This graph shows the average number of hours per month that O'Fallon receives direct sunlight. The numbers are calculated over a 30-year period to provide a reliable average.

• On average, July is the sunniest month with 311 hours of sunshine.
• December has on average the lowest amount of sunshine with 128 hours.
• On average, the total annual amount of sun is 2612 hours.

Forecast: is it sunny in O'Fallon (IL)?

Sat   Nov 23

10°C | 3°C

S 7 km/h

almost clear and no rain

hourly forecast

Sun   Nov 24

18°C | 4°C

S 18 km/h

partly cloudy and no rain

hourly forecast

Mon   Nov 25

15°C | 2°C

NW 25 km/h

1.5 mm

broken clouds and rain

hourly forecast

5-Day Forecast 10-Day Forecast